Two parallel tangents to a given circle are cut by a third tangent at the point `Ra n dQ` . Show that the lines from `Ra n dQ` to the center of the circle are mutually perpendicular.

Two parallel tangents to a given circle are cut by a third tangent at the points A and B. If C is the center of the given circle,then /_ACB depends on the radius of the circle.depends on the center of the circle.depends on the slopes of three tangents.is always constant

Show that tangent lines at the end points of a diameter of a circle are parallel.

To construct the tangents to a circle from a point outside it.

The number of points such that the tangents from it to three given circles are equal in length is

The number of points such that the tangents from it to three given circles are equal in length is

Theorem: A tangent to a circle is perpendicular to the radius through the point of contact.

If we draw a tangents to a circle at a given point on it, when the centre of the circle is known, then the angle between the tangent and radius of the circle is

(iii)If two circles cut a third circle orthogonally,then the radical axis of two circle will pass through the center of the third circle.

A) The radius of a circle is 5 cm. At this point The tangent is drawn if the length of the tangent is 12 cm. Find the distance from the center of the circle to the point.

Point O is the centre of a circle . Line a and line b are parallel tangents to the circle at P and Q. Prove that segment PQ is a diameter of the circle.